Apparatus for making bead cores for pneumatic tires



F. J. SHOOK Feb. 20, 1940.

APPARATUS FOR MAKING BEAD CORES FOR PNEUMATIC TIRES Filed July 8, 1957 2 Sheets-Sheet 1 Hora) J 5/7001? Feb. 20, 1940. HOCK I 2,190,805

APPARATUS FOR MAKING BEAD CORES FOR PNEUMATIC TIRES Filed July 8, 1957 v 2 Sheets-Sheet 2 F/om/ry J 500 INVENTOR 40M aa la ATTORNEY Patented Feb. 20, 1940 UNITED STATES [PATENT OFFICE APPARATUSFOR MAKI N G BEAD CORES FOR PNEUMATIC TIRES I Florain J. Shook, Akron, Ohio, assignor to National Standard Company, .Niles, Mich., a corporation of Michigan Application July 8, .1937, Serial No. 152,615 I 14 Claims. (01. 154-4 This invention relates to procedure and apparatus for making bead cores for pneumatic tires. I

Its chief objects are to. provide for economy in the manufacture of such bead cores; to provide an improved product; to produce a bead core consisting of a winding of rubberized metallic mesh material having its convolutions so well adhered to each other as to make it practicable lo to omit taping of the core at the two ends of matic means for performing the several steps of making the bead core, including an ironing step subsequent to the winding operation. 201 .Of the accompanying drawings: I

Fig. lis a somewhat diagrammatic side-elevation of a machine embodying and adapted for the practice of the invention in itspreferred form. I

'25 I. Fig. 2 is a similar view on a larger scale, from the same viewpoint, of an ironing device con.- stituting a part of the machine shown in Fig. 1.

Fig. 3 is a section on line 3-3 of Fig. 2. Fig. 4 is a top view of the parts shown in Fig. 2.

30 Fig. 5 is a side elevation, from the same viewpoint as that of Figs. 1 and 2', of a device for guiding the leading end of the bead-core strip as it is projected, by suitable feeding means, to the form on which it is wound, a support for a guid- 35. ing and severing die being shown in section on line 5-5 of Fig. 6.

Fig. 6 is a topview of the parts shown in Fig. 5

and of the guiding and severing die.

The original machine upon which the present 40 invention is an improvement is fully shown and 50 ably, as to overlap the first-wound'end of the first'convolution by. a few inches.

The original machine comprises also means timed with the stopping of the winding form and including push-01f. fingers I2,; I2 (Fig. 1) for pushing the wound bead core off the form at the .,end of each windingoperation, the form having a narrow annular face I3 on which the bead core is wound and being mounted on a projecting shaft I4, and preferably being sectional, as

shown, for adjustment for bead cores of different 5 I diameters; a strip-clamping device including a jaw I5 suitably timedior anchoring in a notch in the form the leading end of a length of core strip projectedinto the notch by a suitably timed pawl-gripper feeder slide It; a guiding and cut- 10 ting die I! through which the strip II is advanced. first bythe forward movement of the slide I6 and then by being drawn onto the form by the rotation of the latter; a suitably timed cutter lt coacting with the die ll for severing I the successive bead core lengths from the continuous strip; and-a ratchet and pawl one-way I guide roller I9 provided with a spring-urged hold-down press'er roller for permitting forward feeding of the strip Ii by the slide I6 and 20 by the rotation of the winding form but adapted to prevent backward movement of thestrip while the slide I6 is making its return movement for a new grip on the strip, the one-way guide roller I 9 preferably being knurled to give it a good grip. 5 on the strip.

The actuating mechanism for the pawl-gripper feeder slide It comprises a rack I6 secured to its lower side, a pinion Ifi meshed with said rack and with a stationarily mounted rack I6, and a cam-actuated lever I6; connected to the pinion by a pair of links such as the link I6 this arrangement being such as to cause thefeeder slide IE to move twice as fast and far as the upper end of the lever I63 The present invention resides in the provision of the several instrumentalities hereinafter described.

Mounted upon the projecting end portion of the shaft I4, in position to receive the annular bead core when the latter is pushed off the winding form ill by the fingers I2, is an anvil member 2i having secured on its annular outer face a helical bead-core-positioning on cam member 22 defining a bead-core-receiving roove 22, the effective diameter of this anvil member being substantially less than that of the winding form,

and consequently substantially less than that of the wound bead core, II so that the latter, falling onto the anvil member with its upper 5() portion in the first convolution of the groove 22, is loosely suspended from the anvil member, as is clearly shown in Fig. 2, this arrangement being such that in the rotation. of the shaft, form Ill and anvil member Z I in the winding of the next bead core the bead core that has been deposited upon the anvil member will be fed lengthwise of the shaft by a sort of screw-thread or conveyor action of the radial rear wall of the heiical groove.

To assure that the bead core will position itself against the said rear wall as the bead core is received upon the anvil member, even though the bead core be narrower than the groove, the

anvil member is formed, at the partthereof which is uppermost when it receives the bead core, with a radial guide aperture for a cam member 28 which extends into the groove and is formed with a bevel cam face 23 (Fig. 3) adapted to crowd the bead core toward the rear wall of the groove as the hanging bead core is urged downward, first by gravity and then by theportion.

For assuring that the presser roller it ,will not be violently engaged by the terminal end portion 22 of the helical rib or cam member 22 in rotation of the anvil member after the beadcore has passed therefrom, andalso for assuring accurate positioning of the bead core and its last wound end portion on'the anvil member as the presser' roller completes its pressing operation,

the said end portion 22*" of the rib member is hingedto 'its main portion at 22 and is urged toward the adjacent convolution of the rib member by a pull-spring 22 connecting it with the anvil member. .1

The ironing roller 2d is formed with a cylindrical annular face 35 for pressing the bead-core against the floor of the groove 22 and, adjacent said cylindrical face, with an outwardly extending annular flange 35 having a. generally radial but transversely rounded face 36* for keeping I the bead core against the rear wall of the groove.

The ironing roller 24 is slidably journaled upon an axle 3i projecting-from a lifting lever 38, to permit the roller, in the groove, to be fed toward the delivery end of the anvil member .by being crowded by the bead core in contact with the radial face 36 of the flange 36, and the axle preferably is so positioned that the roller stands at a slight-angle to the helical rib member, as shown clearly in Fig. 4, so that the roller will travel freely in the helical groove, the roller being of substantially the same-width as the groove, with the face 35 of slightly less width than the bead, this arrangement assuring that the bead and its loose end portion will be properly positioned when the roller 2d is pressed against the rear wall of the groove by the spring-backed hinged section 22 The lever it is fulcrumed on a shaft at-tt and has an arm @8 beyond its fulcrum. which armhas connection through a breakable link iiha bell-crank G l and a' link t?! with abell-cranl; 53 provided with-a cam roller M adapted to be engaged by a cam tiifor lifting the presser roller 2 to the dotted line position of Fig. 1; and for yieldingly holding the presser roller down upon the work when thecam 35 leaves the camroller 44 a pull spring 45 connects a part of themachine frame with a vertical travelling lever 45*, having other functions not material to the present invention, which is provided with a roller 45 running on a vertical rail 45 the lower end of the travelling lever being hinged to a lever arm th which is rigid withthe cam-roller arm 53 and the position of the pull spring 45 being such as to exert an upward force upon'thearm 45 For sliding the ironing roller 261 on its axle 31 toward a stophead 31 on the latter, to return the roller, when the arm 38 is raised, to proper position for re-entering the bead-core-receiving portion of the groove 22 in being again lowered into operative position, a shifter-fork 2 3 straddling the axle 3i and'adaptedto bear against the adjacent side face of the roller is secured to a small vertical rock-shaft ll which is mountedin anear or lug 38 which projects from a side face of the lever 38, the rock-shaft 41 having secured on its upper end-a rocker-arm 49 (Fig. 4)

connected by a breakable link 56 with a stationary bracket 54, the connection of the link wise movement leaving the presser-roller properly positioned against the outer end of its axle, when the arm 38 is again lowered; I

The links so and M are made breakable, the former by reason of a hinge-pin Mi and a locking pin eb and the latter by reason of a hingepin bil and an over-center stop-block 58*, only to permit the presserrroller arm to be lifted for the substitution of .winding forms of different sizes and to permit the swinging or" the shifter fork without movement of the arm 38.

i For preforming the bead core strip it in the sense of giving ita slightperm-anent set such that it tends to assume a curved condition, although thereafter it istemporarily held somewhat straightened by tension of the feeding means in a partof its path to the winding form, the permanent set being such as to causethe strip to tend to hug, the winding. form,- or :at least to resist less strongly its conformance --.to the curvature of the winding form, a guide roller 55 of small radius is mounted in such position. that the strip must pass partly around it, andthus be bent to its shortradius of. curvature-,in

holding roller I9.

Such preiorming of the strip gives to its foremost portion, where .it is severed by the cutter iii, 'a tendencyto curve downward as it is projected beyond they die I! 'by the feeder slide it, which makes it desirable to provide guiding means between the die E'l'and the winding, form, to assure that the preformed, projecting for ward end of the strip will pass into the clamping notch of the form.

It is desirable that such guiding means. be out of the way, to permit the trailing end of the pree formed strip to snap downward onto .or toward" the underlying wound convolutions, when the strip is severed at the end of the winding operation.

The guiding means of the'embodiment here shown comprises'a guide trough 51 adjustably mounted upon a plate 58 constituting one merriber of a parallel motion of which the links-59,

6d (Figse 5 and 6) connect. the :plate 58ewith a stationary bracket member 6|. The link 59 is secured on the upper end of a vertical rock-shaft 62 mounted in the stationary bracket member 6! and having on its lower end a rocker-arm 63 connected by a pull-link $4 with one arm 65 of a lever structure of which the other arm, 65, is provided with a cam member 6? adapted tobe engaged by a cam face 68 formed on a part of the feeder-slide structure I 6, to move the guide trough 51 into its guiding position at the beginning of the forward movement of the feederslide. A pull spring t9, connecting parts of the parallel-motion links 59, 6!] which are at differ-- ent distances from the fixed pivots of the linlrs,

is provided for removing the guide-trough from its guidingposition as the cam face 68, in the.

return movement of "the slide, passesout of contact with the cam member 61. This takes place in an early part of the winding operation, and at this time the forwardly moving strip, being preformed as described, is sufiiciently archedbe tween the die and the winding form to permit I the latter to bewithdrawn laterally withoutfouling it, the outer side flange of the guide trough being cut away at its end nearest the die, as indicated at 51 to permit it to clear the strip at that position.

The stationary bracket member 6! is a lateral projection from a stationary arm 6 P in the outer end of which is mounted the guiding and cutting die H. The stationary arm iii (Figs. 5 and 6) extends horizontally from a part of the framing of the machine and is formed also with an oppositely positioned lateral projection 66 which 7 serves as the mounting for the lever structure An inclined guide or skid-plate 10 (Figs. land 4) preferably is secured by screws ill (Fig l) to the anvil member 2| for sliding the bead core onto the anvil member as its is pushed off of the winding form by the fingers l2.

The operation of the mechanism has been adequately brought outinthe foregoing description of the construction, the arrangement being such that successive bead cores are automatically wound and ironed or pressed to compact the convolutions and adhere them together, at the leading and the trailing end portions of the winding, and the bead cores in succession are crowded off the delivery end of the anvil mem ber, falling by gravityonto such receiving means as may be provided.

I claim: i

l. The combination of means for winding a strip of material to form an annulus, means timed therewith for pressing a superposed portion of the strip upon an underlying portionby progression lengthwise of; the strip, the said means for pressing being spaced, in an axial direction, from the said means for winding, and automatic means for transferring the annulus from the first said means to the second said means. p

2. The combination of means for winding a strip of material to form an annulus, means timed therewith for pressing a superposedportion of I the strip upon an underlying portion by progression lengthwise of the strip, the said means for pressing being spaced, in an axial direction, from thesaid means for winding, and automatic means for transferring the annulus from the first said means to the second said means, the winding means and the pressing means comprising a wind ing form and an anvil member both mounted upon a projecting shaft and the anvil member being toward and ofi of its outer end and an annulus sus-. pended on the anvil member.

3. The combination of means for winding a strip of material to form an annulus, means timed therewith for pressing a superposed portionof the strip upon an underlying portion by progression therewith for pressing a superposed portion of,

the strip upon an underlying portion by progression lengthwise of thestrip, and automatic means for transferring the annulus from the first said means to the second said means, the winding means comprising a winding iorzn,means for severing successive lengths of the strip of material, and means forpreforming :the strip to a curvature adapting it to be easily conformed to the surface of the winding form.

' 5. The combination of means forwinding a strip of material toform an annulus, means timed therewith for pressing a superposed portion of the strip upon. an underlying portion by progression lengthwise of the strip,and automatic means for provided with helical cam means for crowding transferring the annulus from the first said means to the second said means, the winding means comprising a winding form, and means for preforming the strip to a curvature adapting it to ,be easily conformed to the surface of the winding form. i

6. The combination of means for winding a strip of material to form an annulus, means timed therewith for pressing a superposed portion of the strip upon an underlying portion by progression lengthwise of the strip, and automatic means for transferring the annulus from the first said means to the second said means, the winding means comprising a winding form, means for preforming the strip to a curvature adaptingit to be easily conformed to the surface of the winding form, and means for guiding the leading end portion of the strip under an only temporarily effective straightening strain onto the winding,

form. r

'7. The combination of means. for winding a strip of material to form an annulus; means timed therewith for pressing a superposed portion of the strip upon an underlying portion by progression lengthwise of the strip, and automatic means for transferring the annulus from the first said means to the second said means, the winding means comprising a winding form, means for preforming the strip to a curvature adapting it to be easily conformed to the surface of the Winding form, means for guiding theleading end portion of the strip under an only temporarily effective straightening strain onto the winding form, the guiding means being so mounted as to have an operative position in alignment with the path of the strip and an inoperative position out of the way of the strip and being shiftable from one to the other of said positions in alternation,

and means for shifting the guiding means from its operative position to. its inoperative position.

.8. Apparatus for making a wound annulus of strip material, said apparatus comprising a winding form, means for preforming the-strip to a curvature adaptingit to be easily conformed to the surface of the winding form, means for guiding the leading end portion of the strip under an only temporarily effective straightening strain onto the winding form, the guiding means being so mounted as to have an operative position in alignment with the path of the strip and an inoperative position out of the way of the strip and being shiftable from one to the other of said positions in alternation and means for shifting the guiding means from its operative position to its inoperative position.

9. Apparatus for pressing an annular article,

H said apparatus comprising an anvil member pro vided with helical cam means for crowding toward and oif of the end thereof an annular article bearing upon it, means for pressing the article against the anvil member, and means for effecting relative rotation of the anvil member and the article to cause the crowding action.

10. Apparatus for pressing-an annular article, said apparatus comprising an anvil member formed with a helical cam face for crowding toward and oil of the end thereof an annular article bearing upon it, means for pressing the article against the anvil member, and means for effecting relative rotation of the anvil member and the article to cause the crowding action.

11. Apparatus for pressing an annular article,

said apparatus comprising an anvil member pro vided with helical cam means for crowding toward and off of'jthe end thereof an annular articlebearing upon it, means for pressing the articlev against the anvil member, means for effecting relative rotation ofthe anvil member-and the article to cause the crowding action, and means for relative holding the article against movement away from the cam means.

12. Apparatus for pressing an annular article, said apparatus comprising an anvil member provided with helical cam means for crowding toward and as of the end thereof an annular article bearing upon it, means for pressing the article against the anvil member, means for effecting article to cause the crowdingaction, and means for so holding the article comprising a spring hacked member formed with a cam face for engagement with. the article.

14. Apparatus for pressing an annular article, said apparatus comprising an anvil member provided with helical cam means for crowdingtoward and oi? oi the end thereof an annular article bearing upon it means for pressing the article against the anvil member, means for effecting relative rotation of the anvil member and the article tocause the crowding action, and means for holding the article against movement away I from the, cam means, the means for so holding the article comprising a radially-yielding springrotation of the anvil member and the backed member formed with a cam face for engagement with the article. EEORAIN J. SHOCK. 

